Weighing scale



March 4 1924.

' H. C. SCHAPER WEIGHING SCALE Filed aan. 12

2 Sheets-Sheet 1 H. C. SCHAPER WEIGHING SCALE March 4 1924. 1,485,470

Filed dan. 1.2, 1921 2 Sheets-Sheet: 2

@m @QW- aw@ Patented Mar. 4, 1924,

UNITED STATES PATENT OFFlCE.

HARRY C. SCHAPER, F ST. LOUIS, MISSOURI, ASSIGNOR "IO THE GENERAL AUTOMATIC SCALE COMPANY, 0F ST. LOUIS, MISSOURI, A CORPORATION 0F MISSOURI.

Application led January '12, 19.21.

lie it known that I, .HARRY C. SorLirnn, a citizen of the` YUnited States, residing at St. Louis. Missouri, have invented a certain new and useful .lmprovenunt in lWeighing' `Scales. of which the .following is a. full, clear, and exact description. such as will enable others skilled in the art to .vhich it appertains to .make and use the same reference being had to the accompanying drawings, iiforming part of this specification.

This invention relates to new and useful improvements in weighing scales, the object being to provide a scale. the supporting parts of which are adjustable independently of each other wliereby the scale can be adjusted to properly and accurately register the weight of the load placed on the weighing platform.

Other objects are to suspend and support the weighing platform so that any sidewise `movement of the platform will not disturb the, bearings and impair the accuracy of the scale; to provide bearings for the spider or platform carrying frame in which the fric-- tion is reduced to minimum and which bearings are adjustable independently of each other so that the platform-carrying frame and the weighingr platform can be maiir tained in proper position.

A further object .is to provide a yielding connection interposed between the weighing jilatform and the spider, which yielding conneet ion or support will absorb any shocks or jars to which the weighing platforn'i may he subjected thereby protecting the bearings of the scale from strain and wear, to which the hearings would he subjected tlnough jars or excessive movement of the platform and which would affect the efficient operation of the scale.

Vith the foregoing and other objects in view, my invention consists in certain features of construction and arrangements of parts, hereinafter more fully described and claimed. and illustrated in the accompanying drawings, in whichf Figure 1 is a front elevation of the scale:

Figline 2 is a horizontal cross section of the housing of the scale and parts supported therein; n

Figure 3 is a longitudinal cross-section taken on line'S-S of Figure 2;

WEIGHING SCALE.

Serial No. 436.691,

ure et is a transverse section taken on l* ig the li .e 4 4 of Fig'. 2;

Figure 5 is a detail cross-section taken on line 5--i of Figure 2;

Figure is an enlarged vertical cross-section of one of the bearings used for vsupporting the spider.

Reiniring by immer-als to the accon'ijianying wl gs, 1() indicates the base or housing of l'ioxle structure provided with a fe opening l1 at the top and having a removaliile bottom plate The side walls of the housing 1() are provided with inwai-diy projecting and vertically disposed lugs .Tn these are formed if'ertically disposed apertures or openings 14, having their lower portions three-.ded as indicated at to engage adjustable plugs or screws 16. The lower ends of bearings 17 enter the upper ends of apertures 14 and rest upon plugs 1G. The upper ends of bearings 17 are provided with hearing blocks 18 having V- slnrped grooves in their upper faces. Blocks 1S are preferably made of hardened metal and are retained in position in bearings 17 by means of pins 18% Resting in V-shaped grooves of hlocrrs 18 are knife-edged blocks 19, which are seated in the midei'faees of the ends of levers 2O and 21.

Lever 20 is transversely disposed in the trent end of housiin;` 10 and lever 21. which Yis parallel to lever 20, is similarly disposed iu the rear part of housing .10, Projecting laterally and inwardly from levers 2O and Q1. at points adjacent to their endsj are hori Zontally disposed arms 22 and 23, respectively, in the ends of which are seated up wardly projecting knife-edged hearing blocks 2li. These knife-edged blocks 24 engage the Veshaped grooves formed in bearingr blocks 25 which are carried by the up per ends of loops 26.

The spider or platform-earrying frame 27, which is preferably of rectangular shape. occupies a position within the opening 11 in the top of housing 10. Depending from the corners of said frame are stirrups 28, each sti rrup straddling the end of the corresponding arm 22, or 23, and loop 26 which is sus pended from said arm. The lowermost portion of each stirrup is provided with bearings 29 having a conical socket or seat 29a in the underside. (See Figure 6.) Arranged to rest in said eonical socket or seat is the convex'. portion ot a seinispherieal hearing ineinher 30, supported in position lijf rod 3l. l. ill. passes through centrally arpenings in sleeve 29 and stirrup 28 These openings in slee rves 25) and i.

"El e if siniieientsize to Virrups :i )lique nmreni ot rod Ell `without,

levers 2O Bj' t o it is threaded. the seinispherical s supper-tel on said rod h5 1 l loch nut 32a. ller 3,2 an: i.-

Sli carried by rods posit-i n ln. levers 2t and i if respective arras 22 and Lil and eorresponding' loops constitute va tour-poilu support tor spider 2.7 and each one of these points ot support is ad'instahle independt-:ntlj' olf the others h v the turning' ot' nuts 32 and lool; nuts 322'- in proper direetiori` therehjY raisingl or loweringl the seniispherieal hearing 30 on Which the sti rups 2S of spider 2? are supported.

ln order to prevent lengthwise moveis 2l and 22 in the V-shaped `1ro ,ves olf hloelis 1S, plates 325 are removahlv secured to the outer ends oit hearings l? Which plates are arranged to engage the ends oi knife-edged hloclis lll and therehv j rerent end thrust oiC levers 20, 2l.

Projecting lateralljY and rearwardly from lever 2G is a horizontal arin havingl a don'nrrart curved portion 35 Where said arni passes under the lever 2l so as to clear said lever. The Atree end ot arni is provided with a horizontal extension 535 n'hieh is adjustahle h v serev.' 5ST Carried hy' said extension and whose end is arranged to iiupinee upon a portion ot arin 534. EX- tension lo is designed to he locked in its adjusted position hy nut 3S. rllhe outer end ot extension 3C is prrr-sided n'itn a hearing,r pin 39 which rests .in hearing' 4.0 in loop il. ano the latter is carried hv the lower end ot a verticalljv disposed rod -jl-2, Which enters housing l0 through an opening` 1la i'oiined in the top or the rear portion oit housing l0, rThe ripper end o'llrod 42 is connected to a scale heain lf3 supported in the rear portion of housing' l0 h v a strandard -l-l. (See Figure l.)

Horizontal arin 34e is provided Wit/h hearing blocks -l' having V-shaped grooves in their upper faces and located on each side or"A openingv which opening)` is formed in said arin midway between the levers 2O and 2l. Projecting forwardly 'from lever 1 ,lisa/rre rw'pifhL is poche" hieh are in vertical ahneniem, with rods 3l and learinnj blocks 2- and 25.

(loiled springs o() are located in each recess and to in a yielding support for the weigijhing` platform 5l. the .litter haringF Llo,'\'iin'ai llj' extending lugs which tit into recesses in spider L?, and rest on top ol' spring a0.

li are provided al' their lower ends with projections or pins which are adapted to rest on the bottoni ot recesses 27a. when a load sul'licient to overcome springs .itl is placed on the Weighing platforro..y so that the weigh olf the load is at l tiines transmitted 'foin the weighing .titorin to the spider a points which are in vertical alinenient with the spider-snpportingl means, nana-lj' sleeves 2), seniispl'mrieal hearings 80, rods S1 and the knifeedged hearing-hloclrs 24. and 25. The lever supportinnl hearings i8 and l0, the spidersupporting hearing.e and 25, hearings 47 and 8, an(L hearings 39 and T10 are located on the saine horizontal plane, and levers 2O and 2l and arnis and 4:5 are so shaped that the Weight of the said levers and arms is lieloiv this horizontal pane, thereby jnstljY stabilizing` the strueture and distrilniting` the, Weight properly among the h aringrs, an arrangement which provides uniiiorn'i Wear of the hearings and insures ac raej' or the operation of the scale. Arm 3lis provided with pads 53, to which a level can he applied in order to properlyY adjust the seale.

lVhen a load is placed on the Weighing platform 5l. platform 5l. and spider 27 inove downiardly, therein causing levers 2O and 2l. through their connections with the stil-rups 28 of said spider. to rock in ther hearings. Horizontal arni. 34., being connected to leiter 2O and having operative connections With lever 2l through arrns 4:5` nieves downwardly a distance depending upon the Weight placed upon platform 52` and actnates heain 4-3 or other indicating mechanism h v rod 42.

In order to adjust levers and 2l threaded plue's 16 in. lugs i2 are manipulated to raise or lower hearings 17 until levers 20 and 2l and arms 34 and 45 and their respective hea-rings are all in proper alinernent. The adjustment ol? the Weighing platform 52 accomplished h v raisingr or lowering seinispherical hearing meinhers 0n rods 3l by means oli' nuts 32. By making semispherical hearings 30 independently adjustlll) ableof cach other, the points of support for the platform can be adjusted so that the weight equally distributed to all of the bearings 3() of spider 27 and equally transmitted to the bearings of the scale, so that the bearings are protected from unequal strains and friction. The yielding means interposed between the weighing platform and the spider or platform supporting member serve as shock absorbers, whereby any jars or shocks imparted to the weighing platform. and which would injure the bearings or otherwise disturb the accuracy of the scale, are absorbed by the yielding means.

'By virtue of the use o t semispherical beatrings il() in cone-sl'uiped bearing 29, bearings are provided in which the friction is reduced to minimum and the weighing platforms 52 and 2T are permitted movement in the horizontal plane without displacing or injuring any of the parts of the scale or affecting the efficient operation of it.

A weighing scale of my improved construction is comparatively simple, is capable of being readily adjustable so as to insure accuracy in operation, and is very effective in performing its intended functions.

It will be readily understood that minor changes in the size, form and construction of the various parts of my improved weighing scale can be made and substituted for those herein shown and described Without departing from the spirit of my invention, the scope of which is set forth in the appended claims.

What I claim is:

l. In a weighing scale, a housing, a pair of levers supported in said housing and adapted to operate Weight indicating mechanism, a spider frame suspended from said levers and having its points of suspension on a horizontal plane with the fulcrums of said levers, a weighing platform supported on said spider frame, and means mounted in said housing for adjusting said levers in vertical plane.

2. In a weighing scale, the combination with the beam scale, of a housing, adjustable bearings in said housing, a pair of interengaged levers supported in said bearings and connected to said beam, a spider frame exibly suspended from said levers and having its points of support on a horizontal plane with the operating points of said levers, and a weighing platform supported on said spider.

3. In a weighing scale, the combination of its beam, of a housing, adjustable bearings in said housing, a pair of levers fulcrumcd in said bearings and connected to said beam, a spider frame, means suspended from said levers and having flexible connection with said spider frame, the points of suspension of said means being on the same horizontal plane with the fulcrums of said levers, a weighing platform supported on said spider, and means for adjusting said bearings.

fi. In a weighing scale, the combination with its beam, of a housing, a pair of levers supported in said housing and having operative connections with said beam, a spider frame having an adjustable ball and socketsuspension connection with said levers, and

a weighing platform supported on said spider.

5. In a weighing sca-le, the combi-nation with its beam, of a housing, a pair of levers supported in said housing and having operative connections with said beam, a spider frame adjustably suspended from said levers, a: weighing platform supported on said spider, and means for adjusting said spider frame in vertical pla-ne.

6. In a weighing scale, the combination with its beam, of a housing, a pair of levers supported in said housing and having `oper ative connection with said beam, a spider frame, a weighing platform supported on said spider frame, and means for suspending said spider :frame from said levers, said means having a universal joint connection, whereby said spider frame and the weighing platform are movable in horizontal plane.

7. In a weighing scale, the combination with its beam, of a housing, a pair of levers supported in said housing and having operative connections with said beam, a spider frame, a weighing platform supported on said spider frame and means suspended from said levers and having a convex bearing surface upon which said spiderv frame is supported.

8. In a weighing scale, the combination with its beam, of a housing, a pair of levers supported in said housing and having operative connections with said beam, a spider frame having depending members provided with conical sockets, a weighing` platform supported on said spider frame, and spherical bearings suspended from said levers and adapted to operate in said conical sockets and support said spider frame.

9. In a weighing scale, the combination with its beam., of a housing having inwardly projecting lugs, vertically adjustable means disposed in said lugs, bearings supported in said lugs by said adjustable means, a pair of levers supported by said bearings and connected to said beam, a spider frame adjustably suspended from said levers and a weighing platform carried by said spider frame.

l0. In a weighing scale, a housing, a pair of horizontal levers adjustably mounted therein and having laterally projecting arms, a spider frame having downwardly presented loops which straddle said arms,

suspension means having ball and socket connections with said loops and a knifeedge connection with said arms, and a Weighing platform yieldingly supported on said spider trame.

11. In a Weighing scale, a housing provided with bearings, a. pair of horizontal levers adjustably mounted in said bearings, a pair ot short arms projecting laterally from each lever and provided with bearings,

a spider frame adjustably supported on the last mentioned bearings, a long arm projecting laterally from one of said levers and having an extensible bearing at its end adapted to engage a member having operative connection With a scale beam, a short arm projecting from the other one of said levers and having a bearing in said long arm, all of said bearings being arranged in the same horizontal plane.

12. In a Weighing scale, the combination with a scale beam, of a housing, a pair of horizontal levers adjustably mounted in said housing and operatively connected to said scale beam, a spider frame adjustably supported from said levers, a Weighing platform supported on said spider frame and yielding means interposed between said spider frame and said platform.

13. In a Weighing scale, the combination with a scale beam, of a housing, a pair of horizontal levers adj ustably mounted in said housing and operatively connected to said scale beam, a spider frame adjustably supported from said levers and provided with recesses at its top, springs positioned in said recesses, and a weighing platform having lugs arranged to enter the recesses in said spider frame and rest on said springs.

14. In a Weighing scale, a housing, a air of horizontal levers adjustably mounte in said bearing and having laterally projecting arms, a spider frame having a plurality of adjustable supports for support-ing said spider frame `from said arms, said supports being adjustable in vertical plane independently of each other, and a Weighing platform carried by said spider frame.

In testimony whereof I hereunto affix my signature this 5th day of January, 1921.

HARRY G. SCHAPER. 

